EP1785730B1 - System und Verfahren zur Untersuchung einer Probenflüssigkeit - Google Patents

System und Verfahren zur Untersuchung einer Probenflüssigkeit Download PDF

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Publication number
EP1785730B1
EP1785730B1 EP05024897A EP05024897A EP1785730B1 EP 1785730 B1 EP1785730 B1 EP 1785730B1 EP 05024897 A EP05024897 A EP 05024897A EP 05024897 A EP05024897 A EP 05024897A EP 1785730 B1 EP1785730 B1 EP 1785730B1
Authority
EP
European Patent Office
Prior art keywords
tape
test
positioning device
sample liquid
measuring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP05024897A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1785730A1 (de
Inventor
Uwe Dr. Krämer
Hans List
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
F Hoffmann La Roche AG
Roche Diagnostics GmbH
Original Assignee
F Hoffmann La Roche AG
Roche Diagnostics GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by F Hoffmann La Roche AG, Roche Diagnostics GmbH filed Critical F Hoffmann La Roche AG
Priority to EP05024897A priority Critical patent/EP1785730B1/de
Priority to ES05024897T priority patent/ES2402770T3/es
Priority to PL05024897T priority patent/PL1785730T3/pl
Priority to CA2567675A priority patent/CA2567675C/en
Priority to JP2006307205A priority patent/JP4713443B2/ja
Priority to US11/559,472 priority patent/US8557180B2/en
Priority to CN2006101604288A priority patent/CN1967251B/zh
Publication of EP1785730A1 publication Critical patent/EP1785730A1/de
Priority to HK07112159.5A priority patent/HK1106580A1/xx
Application granted granted Critical
Publication of EP1785730B1 publication Critical patent/EP1785730B1/de
Priority to US14/024,042 priority patent/US9778181B2/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/55—Specular reflectivity
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/14532—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue for measuring glucose, e.g. by tissue impedance measurement
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/483—Physical analysis of biological material
    • G01N33/487—Physical analysis of biological material of liquid biological material
    • G01N33/4875—Details of handling test elements, e.g. dispensing or storage, not specific to a particular test method
    • G01N33/48764—Test tape taken off a spool
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/00009—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor provided with a sample supporting tape, e.g. with absorbent zones
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0295—Strip shaped analyte sensors for apparatus classified in A61B5/145 or A61B5/157
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/8483—Investigating reagent band
    • G01N2021/8488—Investigating reagent band the band presenting reference patches
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/00009—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor provided with a sample supporting tape, e.g. with absorbent zones
    • G01N2035/00019—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor provided with a sample supporting tape, e.g. with absorbent zones cassette structures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/11—Automated chemical analysis
    • Y10T436/110833—Utilizing a moving indicator strip or tape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/11—Automated chemical analysis
    • Y10T436/112499—Automated chemical analysis with sample on test slide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/12—Condition responsive control

Definitions

  • the invention relates to a system for examining a sample liquid, in particular for blood glucose determinations, comprising a test strip having a plurality of test elements, preferably in a tape cassette, a belt conveyor successively transporting the test elements under belt advance to a sample application point and a test element loaded with sample liquid at a measuring location scanning measuring device, wherein the measuring location is arranged in the strip running direction at a distance from the sample application point.
  • the invention also relates to a corresponding method.
  • the WO 2004/056269 describes a test system for body fluids with a test tape for providing a plurality of on a carrier tape in sections applied test units in a compact hand-held device. This should be imposed as little as possible handling steps in usually repeated daily blood sugar self-checks of the person concerned. In order to be able to dose the smallest possible amount of blood, a deflection of the test elements via a deflection tip is provided, which at the same time forms the measuring point. In addition, it is also mentioned that a Measurement position at a distance from the collection position makes it possible to separately position a readout optics or electrochemical analysis unit in the device.
  • the US 6,707,554 B1 describes a photometric analysis system for test elements in the form of test strips which are positioned over device stops. In order to be able to compensate for tolerances, several point light sources are provided for illuminating different areas of the detection zone on the test strip, in which case a selection based on the signals obtained is to be made.
  • the object of the invention is to further improve the systems known in the prior art, in particular to provide the possibility for an optimized device design and to enable a reliable measurement with as small amounts of sample as possible.
  • the invention is based on the idea of allowing a targeted measurement of the test elements without mechanical positioning elements. Accordingly, according to the invention a proposed to the presence of sample liquid on the respective active test element responsive, the tape transport device driving positioning proposed to interrupt the tape transport for positioning a sample liquid bearing wetting region of the test elements at the measuring location. In this way, it is possible to provide a larger test area for the sample application, without a full-coverage coverage would be required. Especially in blood glucose measurements thus sufficient microscopic amounts of blood, which can be obtained painless, with additional comfort can be created by an integrated lancing unit, because the collection is not adjusted by a measuring unit.
  • the transport positioning simplifies the system design and makes the installation space more usable, and it can be ensured that a targeted detection always takes place even with variable sample application.
  • the positioning device comprises a belt drive coupled to a specially realized by a program routine of a microprocessor control unit for a targeted belt stop at the measuring location.
  • a further improvement is achieved in that the positioning device has at least one optical detection unit responding to the passage of the wetting area.
  • the positioning device has two light sources aligned on band pass points before and after a useful signal detection zone of the measuring device. This can be realized in a particularly simple manner by virtue of the fact that the positioning device has a plurality of light-emitting diodes which are illustrated as light spots on the test strip in succession in succession in the strip running direction via a common collecting optics.
  • the positioning device has at least one photosensor for preferably reflectometric scanning of the test elements.
  • the photosensor detects a blank value in an unwetted test field area and a different target value in the wetting area.
  • the measuring device has a separate from the positioning device detector for the Nutzsignaler charged for detecting an analyte in the sample liquid.
  • test elements are formed by flat test fields, preferably in the form of a reagent layer, on the test strip, wherein the test fields can have a reference range for a blank value measurement, which is preferably kept free of the sample liquid by a liquid barrier.
  • test tape is provided at least in sections with a tape marking, in particular a line scale, and that the positioning device has a scanning means, in particular a light barrier for scanning the tape marking in the course of tape advance.
  • the wetting range of the test elements has a diameter of less than 5 mm, in particular from 1 to 2 mm.
  • the measuring location is at a distance of 5 mm to 5 cm from the sample application point.
  • a further improvement of the system design, in particular for blood glucose measurements, is achieved by arranging a lancing device for insertion into a body part, preferably through the test band, at the sample application site.
  • the object mentioned in the introduction is achieved in that by a positioning device responding to the presence of sample liquid on the test element, the belt transport is controlled to position a sample liquid bearing wetting region of the test elements at the measurement site.
  • the test system shown in the drawing comprises a test tape 12 inserted as a cassette in a handheld device 10 with a plurality of test elements 14 thereon, a belt transport transporting device 16, a measuring device 18 for optically inspecting the test elements 14 and a positioning device 20 for positioning the test fields 14 in the detection range of the measuring device 18.
  • the test tape 12 can be withdrawn from a supply spool 22, withdrawn via different pulleys 24 and a deflecting tip 26 in the direction of tape travel (arrow 28) and wound up on a take-up reel 30 again.
  • the tape advance is made possible by an engaging on the take-up reel 30 motorized tape drive 32.
  • the test elements 14 in the region of the deflection tip 26 can be subjected to targeted body fluid (blood) as a sample application point and then optically scanned at the measurement location 36 by means of the measuring device 18.
  • the test elements 14 consist of two-dimensional test fields of a reagent layer 38, which is applied to a transparent thin carrier tape 40.
  • the reagent layer 38 reacts with color change to an analyte contained in the blood fluid (Glucose), so that an optical detection by means of the measuring device 18 is possible.
  • the region 42 wetted with blood or sample liquid can vary from measurement to measurement, it being ensured by the positioning unit 20 comprising a microprocessor that the wetting region 42 is accurately detected at the measurement location 36 remote from the application site 34.
  • the tape drive 32 is driven accordingly, so that the positioning is achieved by a transport interruption, without additional mechanical elements would be necessary.
  • the test field 14 has a reference region 46 separated by a hydrophobic liquid barrier 44 for a blank value measurement.
  • Fig. 4 illustrates the fine positioning of the wetting region 42 at the measuring location 36 by means of a photometrically operating positioning device 20.
  • Fig. 4a In the side view according to FIG Fig. 4a are three consecutively arranged in the direction of tape 28 light emitting diodes 48 shown, which are imaged via a converging lens 50 as corresponding light spots 52 in a row on the continuous belt 12.
  • the distance of the outer LEDs 48 is in the order of the ordinary Expansion of the wetting zone 42, ie in the range of a few millimeters. From the view Fig.
  • the light 54 emitted by the light-emitting diodes 48 and reflected back diffusely by the test elements 14 on the test strip 12 is detected laterally outside the direct reflection by a photosensor 56 of the positioning device 20.
  • the LEDs 48 can be controlled separately from each other.
  • the sensor 56 in addition to the wetting recognition, to simultaneously serve as the useful signal detection.
  • FIG. 5 different output signals of the sensor 56 are shown in spatial association with the respective wetting states of the test field 14 shown above.
  • a blank value L is detected in both areas ( Fig. 5a ).
  • center wetting of the area 38 is there a lower value B of the remission is measured according to a color change in the reaction layer.
  • Fig. 5c and d show the situation of marginal wetting at the beginning and at the end of the reaction area 38, while in Fig. 5e a full-surface wetting is shown.
  • test tape 12 may have a piercing opening 58 arranged upstream of the test element 14 for a lancing unit arranged in the region of the sample application point 34.
  • a lancing unit arranged in the region of the sample application point 34.
  • the fine positioning by means of the described series of light emitting diodes 48 after Fig. 4 respectively.
  • the blank value L is detected and stored for comparison.
  • the applied blood is detected by a lowered plateau or target value B, which is smaller L but greater than zero.
  • a control unit of the positioning device 20 interrupts the belt drive 32, so that the blood-wetted area 42 lies in the irradiation area of the middle LED 48, with which the actual detection measurement is then carried out.
  • a third LED can be used 48 be provided (in Fig. 4a the left LED), by which, in an additional response to blood, it is ensured that all of the useful signal detection area illuminated by the middle LED is in the blood wetted test field area 42.
  • a line scale 60 is additionally applied at a defined distance from a respective test element 14.
  • the positioning unit 20 comprises two light barriers 62, 64 for scanning the test strip 12 passing through a housing edge 66 or seal 68. Blood is obtained at the sample application point by means of the lancing unit 70 (FIG. Fig. 6a ) and then applied to the test field 14 after a corresponding belt advance ( Fig. 6b ). In the course of a further belt advance, the beginning of the wetting area 42 is detected by means of the first light barrier 62 (FIG. Fig. 6c ).
  • the associated band position is determined at the second light barrier 64 via the graduated scale 60.
  • the end position of the wetting area can be determined.
  • the required advance for exact positioning in front of the measuring device 18 is then calculated on the basis of the determined tape positions and executed by corresponding further scanning of the scale 60 and control of the tape drive 32, so that in the approached position according to Fig. 6e a precise point measurement is possible.
  • interstitial fluid in addition to blood, other sample or body fluids, in particular interstitial fluid, can also be investigated in the manner described.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Molecular Biology (AREA)
  • Optics & Photonics (AREA)
  • Biophysics (AREA)
  • Urology & Nephrology (AREA)
  • Public Health (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Emergency Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Hematology (AREA)
  • Veterinary Medicine (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Sampling And Sample Adjustment (AREA)
EP05024897A 2005-11-15 2005-11-15 System und Verfahren zur Untersuchung einer Probenflüssigkeit Not-in-force EP1785730B1 (de)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP05024897A EP1785730B1 (de) 2005-11-15 2005-11-15 System und Verfahren zur Untersuchung einer Probenflüssigkeit
ES05024897T ES2402770T3 (es) 2005-11-15 2005-11-15 Sistema y procedimiento para el análisis de una muestra líquida
PL05024897T PL1785730T3 (pl) 2005-11-15 2005-11-15 Układ i sposób badania próbki ciekłej
CA2567675A CA2567675C (en) 2005-11-15 2006-11-09 System and method for analysing a sample liquid
JP2006307205A JP4713443B2 (ja) 2005-11-15 2006-11-13 液体試料を検査するためのシステムおよび方法
US11/559,472 US8557180B2 (en) 2005-11-15 2006-11-14 System and method for analyzing a sample liquid
CN2006101604288A CN1967251B (zh) 2005-11-15 2006-11-15 用于试样液体检验的系统和方法
HK07112159.5A HK1106580A1 (en) 2005-11-15 2007-11-08 System and method for examining a liquid sample
US14/024,042 US9778181B2 (en) 2005-11-15 2013-09-11 System and method for analyzing a sample liquid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05024897A EP1785730B1 (de) 2005-11-15 2005-11-15 System und Verfahren zur Untersuchung einer Probenflüssigkeit

Publications (2)

Publication Number Publication Date
EP1785730A1 EP1785730A1 (de) 2007-05-16
EP1785730B1 true EP1785730B1 (de) 2013-02-13

Family

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Family Applications (1)

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EP05024897A Not-in-force EP1785730B1 (de) 2005-11-15 2005-11-15 System und Verfahren zur Untersuchung einer Probenflüssigkeit

Country Status (8)

Country Link
US (2) US8557180B2 (zh)
EP (1) EP1785730B1 (zh)
JP (1) JP4713443B2 (zh)
CN (1) CN1967251B (zh)
CA (1) CA2567675C (zh)
ES (1) ES2402770T3 (zh)
HK (1) HK1106580A1 (zh)
PL (1) PL1785730T3 (zh)

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EP1852699A1 (de) * 2006-05-06 2007-11-07 F.Hoffmann-La Roche Ag Diagnostische Testeinheit mit Behälter für Testträger
EP2138842A1 (de) * 2008-06-25 2009-12-30 F. Hoffmann-Roche AG Analysehandgerät zur Untersuchung einer Körperflüssigkeit und Steuerverfahren dafür
EP2177914A1 (de) * 2008-10-17 2010-04-21 F. Hoffmann-Roche AG Testbandeinheit und Testbandgerät
EP2221608B1 (de) * 2009-02-18 2015-08-12 F. Hoffmann-La Roche AG Testverfahren zur Untersuchung einer Körperflüssigkeit
EP2461160B1 (de) * 2010-12-04 2013-06-12 Roche Diagnostics GmbH System zur Untersuchung einer Körperflüssigkeitsprobe
US8797395B2 (en) * 2010-12-17 2014-08-05 General Electric Company Optical system for inspecting porous substrates
US8647357B2 (en) * 2011-02-05 2014-02-11 Birch Narrows Development Llc Lancet device with flexible cover
DE102011005254B4 (de) * 2011-03-08 2013-04-11 Bst Bio Sensor Technologie Gmbh Vorrichtung und Verfahren zur Untersuchung von Probenflüssigkeiten
WO2014122324A1 (en) * 2013-02-11 2014-08-14 Roche Diagnostics Gmbh Handheld medical instrument and system for analyzing a body fluid
US9237866B2 (en) 2013-04-29 2016-01-19 Birch Narrows Development, LLC Blood glucose management
US9651532B2 (en) * 2014-02-27 2017-05-16 Honeywell International, Inc. Multi-point gas detector
US10684209B1 (en) * 2015-03-06 2020-06-16 Scanit Technologies, Inc. Particle collection media cartridge with tensioning mechanism
DK3642615T3 (da) 2017-06-20 2022-05-23 Delaval Holding Ab Indretning, kassette og servicemodul til biomarkøranalyse af en mælkeprøve
EP3477287A1 (en) * 2017-10-26 2019-05-01 Roche Diabetes Care GmbH Analyte measuring system and method
SE541514C2 (en) * 2017-12-28 2019-10-22 Delaval Holding Ab A cassette
NL2021692B1 (en) * 2018-09-24 2020-05-07 Lely Patent Nv Milking system with detection system
CN112129749A (zh) * 2020-07-11 2020-12-25 海南蓝瑞科技有限公司 一种用于马桶的尿液自动检测装置

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Also Published As

Publication number Publication date
CA2567675C (en) 2010-09-28
CN1967251A (zh) 2007-05-23
HK1106580A1 (en) 2008-03-14
US20070217950A1 (en) 2007-09-20
CA2567675A1 (en) 2007-05-15
CN1967251B (zh) 2012-07-04
JP2007139770A (ja) 2007-06-07
PL1785730T3 (pl) 2013-07-31
JP4713443B2 (ja) 2011-06-29
US9778181B2 (en) 2017-10-03
US20170205343A9 (en) 2017-07-20
US20140011288A1 (en) 2014-01-09
US8557180B2 (en) 2013-10-15
EP1785730A1 (de) 2007-05-16
ES2402770T3 (es) 2013-05-08

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